Measurement of molecular weight etc. of polymers etc. using light scatter method - whereby sample is passed to photometer via micro-capillary so that there is delay between the arrival of large and small molecules at detectorAndreas van Eikeren, Werner-Michael KulickePatent: DE 4238781 (A1) 1994-05-19

Chemical modification of PTFE surface activated by silicic acid - by reacting with silane primer to give material which can be dyed with acid dyesMohammed A. Mohammed, Volker RossbachPatent: DE 4210594 (C1) 1993-06-24

55

Mixing of media of different viscosities e.g. in mfr. of cosmetics - in which low-viscosity medium flows through chamber into which high-viscosity medium is sprayed radially under pressure so that it is atomised and dissolves immediatelyWerner-Michael Kulicke, Ulf BrunkePatent: DE 4308139 (A1) 1993-09-23

Manufacture of organoaluminoxanes from the reaction of trialkylaluminum with water in an inert hydrocarbon solvent at very low temperaturesHansjörg Sinn, Dieter Clausnitzer, Hergen WinterPatent: WO 8902434 (A1) 1989-03-23